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对江苏省盐城市耕地的土壤肥力定点动态监测结果表明:与1985年全国第二次土壤普查结果比较,盐城市土壤耕层肥力有了显著提高,土壤有机质含量提高了42.49%,全氮含量提高了29.20%,有效磷含量提高了301%,有效锌含量提高了15.5%,有效铁、锰、铜含量丰富,变化不明显,但速效钾含量下降了8.6%,pH值平均为7.67,呈下降趋势,土壤耕层平均厚度为11.5 cm,容重为1.29 g/cm3,有变浅、变重趋势。
The results of the dynamic monitoring of soil fertility in arable land in Yancheng, Jiangsu Province showed that compared with the results of the second national soil census in 1985, the fertility of topsoil in Yancheng City increased significantly, the contents of soil organic matter increased by 42.49% and the total nitrogen content increased 29.20%, effective phosphorus content increased by 301%, effective zinc content increased by 15.5%, available iron, manganese, copper content is rich, the change is not obvious, but the available potassium content decreased by 8.6%, the average pH value was 7.67, decreased The average soil layer thickness is 11.5 cm and the bulk density is 1.29 g / cm3, with the trend of becoming lighter and heavier.